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Q: What number is not an prime number 17 39 23 31?

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17, 23 and 31 are prime. 39 is not.

17, 23 and 31 are prime. 39 is not.

39

51 is not a prime number: 3x17=51

51 is composite number

17, 31 and 23 are.

51 = 3 x 17

17, 19, 23, 29, and 31

17, 19, 23, 29, 31.

No, 12121 is composite. Its prime factors are: 31 x 23 x 17 = 12121

prime numbers above 13 = 17, 19, 23, 29, 31,...

7 11 13 17 19 23 29.

17 and 17 3 and 31 5 and 29 11 and 23

31 = 31 is a prime number 34 = 2 x 17

There are an infinite number of prime numbers after 11, starting with 13, 17, 19, 23, 29, 31, etc.

19 23 29 31 37 41 43 47 53 59

Composite. Its prime factors are 23 and 31.

29

29

No it is 31 x 17.

27

17, 19, 23, 29 and 31 are prime. 15, 21, 25 and 27 are composite..

41

27

527/17 = 31 527 is not a prime number